CVE-2026-69266: CWE-190: Integer Overflow or Wraparound in Microsoft Windows 10 Version 1607
Description
CVE-2026-69266 is an integer overflow or wraparound vulnerability in the Windows DHCP Server component affecting multiple versions of Microsoft Windows 10, including Version 1607. This flaw allows an unauthorized attacker to execute code remotely over a network. The vulnerability has a high severity rating with a CVSS score of 8.8. Microsoft has released official patches to address this issue.
CVSS v3.1
Score 8.8high
Affected software
Microsoft
Windows 10 Version 1607
Microsoft
Windows 10 Version 1809
Microsoft
Windows Server 2012
Microsoft
Windows Server 2012 (Server Core installation)
Microsoft
Windows Server 2012 R2
Microsoft
Windows Server 2012 R2 (Server Core installation)
Microsoft
Windows Server 2016
Microsoft
Windows Server 2016 (Server Core installation)
Microsoft
Windows Server 2019
Microsoft
Windows Server 2019 (Server Core installation)
Microsoft
Windows Server 2022
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves an integer overflow or wraparound condition in the Windows DHCP Server, which can be exploited by an unauthorized attacker to achieve remote code execution. The affected versions include multiple builds of Windows 10 and Windows Server versions, specifically those prior to certain patch levels. The vulnerability is tracked as CWE-190 and has a CVSS 3.1 base score of 8.8, indicating high impact on confidentiality, integrity, and availability. Microsoft has published an official fix for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability allows an attacker to execute arbitrary code remotely on the affected system without requiring privileges, potentially leading to full system compromise. The impact affects confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Microsoft has released official patches to remediate this vulnerability. It is strongly recommended to apply the provided updates from Microsoft to affected systems. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-03T20:44:03.596Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69266","vendor":"Microsoft"}]
Threat ID: 6aa044dbacd9273b49fa7cfe
Added to database: 09/08/2026, 17:24:43 UTC
Last enriched: 10/16/2026, 20:58:23 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 24
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